申请人:Beecham Group p.l.c.
公开号:EP0389176A2
公开(公告)日:1990-09-26
β-Lactams having the formula (I) or a salt thereof are described, together with a process therefor:
wherein Y denotes atoms completing a penicillin or cephalosporin - type nucleus, R¹ is a group of the formula:
HO- [X] n-
in which X is an optionally substituted monocyclic or fused polycyclic aromatic ring system in which the attached hydroxy group is conjugated with the group:
and n is 1 or 2; R² is hydrogen, C₁₋₆ alkyl or aryl C₁₋₆ alkyl; and R₃ is hydrogen or a carboxy protecting group.
Compounds of formula (I) are intermediates useful in the preparation of β-lactam antibiotics having an α-formamido substituent on the carbon atom adjacent to the carbonyl group of the β-lactam ring.
描述了具有式 (I) 或其盐的β-内酰胺及其工艺:
其中,Y 表示完成青霉素或头孢菌素-型核的原子,R¹ 是式中的基团:
HO- [X] n-
其中 X 是任选取代的单环或融合多环芳香环系统,其中所附羟基与基团共轭:
和 n 是 1 或 2;R² 是氢、C₁₋₆ 烷基或芳基 C₁₋₆ 烷基;和 R₃ 是氢或羧基保护基团。
式(I)化合物是用于制备β-内酰胺抗生素的中间体,其在β-内酰胺环羰基邻近的碳原子上具有α-甲酰胺基取代基。